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Analog Devices Inc./Maxim Integrated MAX5023LASA+T
- Part No.:
- MAX5023LASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX5023LASA+T.pdf
- Description:
- IC REG LINEAR 5V 150MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,049
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Product details
Overview
MAX5023LASA+T from Maxim Integrated is a high-voltage linear regulator with integrated microprocessor reset and watchdog timer, delivering up to 150mA at fixed +5V output from +6.5V to +65V input, featuring -60V reverse-battery protection, 60μA no-load quiescent current, and operation across -40°C to +125°C for automotive power-rail conditioning.
For engineers reviewing the MAX5023LASA+T datasheet, MAX5023LASA+T pinout, MAX5023LASA+T application, or MAX5023LASA+T equivalent, this device is selected for robust 5V supply generation in ignition-controlled systems requiring fault-tolerant reset supervision, self-holding enable logic, and thermal/short-circuit protection without external components.
Technical Context
The MAX5023LASA+T implements a BiCMOS linear regulator with internal bandgap reference, active-low open-drain RESET output asserting at 4.625V (–7.5% of 5V), and a 1.6s watchdog timeout triggered by WDI pin inactivity. Its control architecture integrates EN (active-high) and HOLD (active-low) inputs to enable self-holding behavior independent of ignition signal duration.
Thermal management relies on junction-to-case resistance of 2°C/W and an exposed pad soldered to PCB ground, enabling 1.538W dissipation at +70°C ambient with 19.2mW/°C derating above that. The device asserts RESET within 5µs of VOUT falling below threshold and maintains it for 200ms after recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +6.5V to +65V - supports wide automotive battery transients including load dump. |
| Output Voltage | +5.0V ±2% - factory-trimmed fixed output; no external feedback required. |
| Max Output Current | 150mA - guaranteed continuous delivery under thermal limits at +125°C ambient. |
| Quiescent Current | 58µA typical - enables always-on monitoring circuits with minimal standby drain. |
| Reverse-Battery Protection | -60V - withstands jump-start polarity reversal without damage or latch-up. |
| Reset Threshold | 4.625V (–7.5%) - precise brownout detection aligned to 5V µP supply tolerance. |
| Watchdog Timeout | 1.6s - ensures system-level firmware liveness monitoring with hardware enforcement. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive environments per AEC-Q100 stress profiles. |
Pinout & Package
MAX5023LASA+T is housed in an 8-pin SO-EP (small-outline with exposed pad) package. The exposed pad must be soldered to PCB ground for thermal conduction and EMI reduction. Package dimensions comply with JEDEC MS-012AA, outline 21-0111.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Regulator Input | Accepts +6.5V to +65V; requires 10µF bypass to GND; rated for -60V reverse voltage. |
| 2 EN | Enable Input | Active-high logic; internally pulled down via 5MΩ resistor; controls regulator startup. |
| 3 GND | Ground / Thermal Pad | Reference node and primary heatsink; must connect to large copper area for thermal performance. |
| 4 RESET | Open-Drain Reset Output | Asserts low when VOUT < 4.625V or WDI inactive >1.6s; sinks up to 3.2mA at +5V. |
| 5 HOLD | Hold Input | Active-low; forces self-holding state when pulled low after EN activation; internally pulled up to OUT. |
| 6 N.C. | No Connection | Not bonded; must remain unconnected and unstubbed on PCB layout. |
| 7 WDI | Watchdog Input | Accepts TTL/CMOS pulses; reset asserted if no edge occurs within 1.6s window. |
| 8 OUT | Regulator Output | +5V regulated output; requires ≥15µF output capacitor with ESR < 0.5Ω for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Self-holding circuit implementation | HOLD input enables ignition-triggered latching without external MOSFETs or latch ICs. |
| Integrated µP reset supervisor | Shares same bandgap reference as regulator; eliminates external reset IC and timing components. |
| Automotive-grade thermal protection | Thermal shutdown at +150°C with +20°C hysteresis prevents sustained overtemperature operation. |
| Low-noise, high-PSRR regulation | 54dB PSRR at 100Hz enables clean 5V rail for sensitive analog/mixed-signal subsystems. |
| Robust input fault tolerance | Withstands -60V reverse battery and +70V transient surges without latch-up or degradation. |
Applications
| Engine Control Unit (ECU) Power Supply | Body Control Module (BCM) 5V Rail |
|---|---|
Use Scenario: Provides primary 5V supply to microcontroller, CAN transceivers, and sensor interfaces in engine bay-mounted ECUs subject to cold cranking, load dump, and thermal cycling. IC Role / Device Role / Timing Role: High-voltage linear regulator with integrated reset and watchdog, acting as main power supervisor and fault monitor. Use Value: Eliminates need for discrete reset IC and external hold circuitry while maintaining AEC-Q100 compliance and -40°C to +125°C operation. |
Use Scenario: Powers door lock actuators, lighting drivers, and LIN transceivers in vehicle body electronics where ignition-switched enable and fail-safe reset are mandatory. IC Role / Device Role / Timing Role: Regulator with self-holding logic and open-drain RESET output tied to BCM microcontroller's reset input. Use Value: Enables single-wire ignition control with persistent power during key-off diagnostics, reducing BOM count and PCB space. |
| Telematics Control Unit (TCU) Backup Supply | Advanced Driver Assistance Systems (ADAS) Camera Module |
Use Scenario: Delivers always-on 5V to GPS/GNSS receiver and cellular modem memory during vehicle sleep mode, surviving battery disconnect events. IC Role / Device Role / Timing Role: Low-quiescent-current regulator with reverse-battery protection and watchdog supervision for firmware integrity. Use Value: 60μA no-load current extends battery life; -60V rating prevents damage during roadside jump-start attempts. |
Use Scenario: Supplies image sensor and ISP in front-facing ADAS camera mounted behind windshield, exposed to solar heating and vibration. IC Role / Device Role / Timing Role: Primary 5V regulator with thermal shutdown and fast-reset response to maintain vision system uptime. Use Value: 200ms reset timeout ensures deterministic recovery after brownout; 1.538W thermal capability sustains operation at +105°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5024LASA+T | Same package and pinout but lacks WDI; includes SET pin for adjustable output (2.5V–11V). | Suitable where programmable output voltage is needed instead of watchdog supervision. | Select MAX5024LASA+T only if adjustable output is required and watchdog functionality is unnecessary. |
| TPS7B7702QPWPRQ1 | Automotive 40V LDO with integrated watchdog and reset, but lower max input (40V vs. 65V) and 100mA output. | Better suited for 12V/24V systems without extreme load-dump requirements. | Choose TPS7B7702QPWPRQ1 when operating VIN stays ≤40V and lower output current suffices. |
Compared with MAX5023LASA+T, MAX5024LASA+T trades watchdog capability for output adjustability, while TPS7B7702QPWPRQ1 offers tighter automotive qualification but reduced voltage headroom-making MAX5023LASA+T optimal for 65V-tolerant, watchdog-dependent 5V rail designs.
Availability
MAX5023LASA+T is available at Aetrix Electronics and suitable for automotive ECU power supplies, body control modules, telematics units, and ADAS camera systems requiring stable component supply with full AEC-Q100-aligned specifications and long-term lifecycle support.
Supply support for MAX5023LASA+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets, emphasizing high-reliability operation and integration density.
MAX5023LASA+T belongs to Maxim's automotive-grade high-voltage linear regulator family, engineered specifically for ignition-switched 5V/3.3V power rails in harsh environments where reverse-battery survival, thermal resilience, and integrated supervision are critical.
FAQ
What is the reset threshold voltage for MAX5023LASA+T?
The MAX5023LASA+T has a fixed reset threshold of 4.625V, corresponding to –7.5% of its +5V output voltage. This value is factory-trimmed and guaranteed over temperature (–40°C to +125°C). RESET asserts low when VOUT falls below this threshold and remains low for 200ms after VOUT recovers above it. The threshold is derived from the same internal bandgap reference used for regulation, ensuring tight tracking.
Does MAX5023LASA+T support adjustable output voltage?
No, MAX5023LASA+T does not support adjustable output voltage. It is a fixed +5V output device with internal feedback resistors. The SET pin is absent in the MAX5023 series; only MAX5024 variants include the SET pin for configuring outputs between +2.5V and +11V using an external resistor divider. MAX5023LASA+T delivers precisely +5.0V ±2% across load and temperature.
How does the HOLD function work in MAX5023LASA+T?
In MAX5023LASA+T, the HOLD pin implements a self-holding circuit: after EN is pulled high to start regulation, pulling HOLD low locks the regulator ON even if EN later goes low. To shut down, HOLD must be released (allowed to float or pulled high) while EN remains low. An internal 4µA current source pulls HOLD to OUT when unused, so connecting HOLD directly to OUT achieves default latching behavior without external components.
What thermal performance can be expected from MAX5023LASA+T at +105°C ambient?
At +105°C ambient, MAX5023LASA+T's allowable power dissipation is 0.89W, calculated using its 19.2mW/°C derating above +70°C. With +14V input and +5V output, this supports ~99mA continuous output current before thermal shutdown activates. The exposed pad must be soldered to ≥1in² of PCB copper to achieve the specified θJA = 41°C/W and sustain this performance reliably.
Is MAX5023LASA+T qualified for automotive applications?
Yes, MAX5023LASA+T is automotive-qualified with the "/V" suffix implied in its ASA+T package code and explicitly supported by its –40°C to +125°C operating range, AEC-Q100 stress testing alignment, and features like –60V reverse-battery protection and load-dump tolerance up to +70V. It meets requirements for engine control, body electronics, and infotainment power rails in passenger and commercial vehicles.
MAX5023LASA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.5V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 140 µA
- Current - Supply (Max):
- -
- PSRR:
- 54dB (100Hz)
- Control Features:
- Enable, Hold, Reset, Watchdog
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX5023LASA+T FAQ
1.How can I place an order for MAX5023LASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5023LASA+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX5023LASA+T reliable?
The price and inventory of MAX5023LASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5023LASA+T is usually 5 days.
3.What payment methods are accepted for MAX5023LASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5023LASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5023LASA+T?
MAX5023LASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5023LASA+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX5023LASA+T?
For technical support, including MAX5023LASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5023LASA+T requirements.
6.How does Aetrix verify that MAX5023LASA+T is sourced from the original manufacturer or authorized distributors?
All MAX5023LASA+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX5023LASA+T meets industry standards.
7.What is the process for return or replacement of MAX5023LASA+T?
All MAX5023LASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5023LASA+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX5023LASA+T part is unused and in its original packaging.
Return procedure for MAX5023LASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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